package cn.tedu;

import java.sql.Connection;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.util.Scanner;

public class Demo09 {
    public static void main(String[] args) {
        Scanner sc =new Scanner(System.in);
        System.out.println("请输入用户名");
        String username =sc.nextLine();
        System.out.println("请输入密码");
        String password =sc.nextLine();
        try(Connection conn =DBUtils.getConn()) {
            String sql ="select password from user where username=?";
            PreparedStatement ps =conn.prepareStatement(sql);
            ps.setString(1,username);
            ResultSet rs =ps.executeQuery();
            if (rs.next()){
                String pw =rs.getString(1);
                if (pw.equals(password)){
                    System.out.println("登录成功！");
                }else{
                    System.out.println("登录失败！");
                }
            }else{
                System.out.println("用户名不存在");
            }
        } catch (SQLException throwables) {
            throwables.printStackTrace();
        }
    }
}
